Research On Knowledge Service And Processing Technology For Robot Milling Of Complex Curved Surface Parts

Complex curved surface parts are widely used,but for the complicated shape,variable curvature,large distortion and thin-walled structure,the milling process is difficult.What’s more,the existing multi-axis NC machining technology and traditional manufacturing process have been hard to meet the market demand of complex curved parts.With the rapid development of manufacturing informatization,industrial robots are more and more used in the process of production and processing.The use of robotic arm for the milling of complex curved parts and the advantage of precision machining have been widely recognized.Robot milling will be an effective means to improve machining efficiency and processing quality of complex curved parts.Furthermore,the processing and manufacturing process of complex curved parts,which are complicated,involve knowledge resources of cross domain and multi-disciplinary.Through effective use of processing knowledge resources,and establishing information interaction channels of various processing links,and effectively packaging knowledge resources,and providing data and information support in form of services for the process,the processing efficiency can be effectively improved.However,robot milling of complex curved parts lacks processing mode and service system from process planning to processing simulation,and to knowledge service.This paper focused on the technology and knowledge service realization method of robot milling of complex curved parts,and put forward the reference points position calculation method and the knowledge service mode of the milling process.Firstly,the difficulty of complex curved parts machining,machining and kinematic characteristics of robot were analyzed,based on which,construction of simulation environment was completed.Milling process design and calculation of the cutting parameters were done combined with the machining characteristics of the complex curved surface.The reference points position calculation method of the directing point tool shaft control method by cone confluence was given.Secondly,according to the key links of tool path calculation process of integral impeller robot machining such as process planning,milling parameters setting,tool path calculation,milling simulation and so on,tool path calculation process and template of impeller surface were established.The integral impeller milling process by robot was simulated and optimized.Finally,modular integration framework of the robot machining process simulation was founded.Machining processes such as process planning,parameters setting,and tool path calculation,and knowledge resources were packaged.Knowledge service model and flow model were also established,based on which,the knowledge service architecture and components were established,which provided on-demand service for robot machining process.The research results of this paper are significant to improve the machining technology of complex curved surface parts robot milling,and extend the application of knowledge service in milling manufacturing.Idea and method for complex curved surface parts manufacturing process from NC machining mode to intelligent mode are also provided.